Valve-controller mechanism.



H. G. GEISSINGER.

VALVE ooNTRoLLER MEGHANISM. APPL'IGATION FILED FBB.26, 1910.

' rED STATES HARRY G. oEIssINoER,` or NEW YORK, N. COMPANY, or NEW YORK,N. Y.,

Y., ASSIGNOB/ T0 GISSINGER REGULATOR A CORPORATION 0F NEW YORK.

VALVE-CONTROLLER MECHAN ISM.

Sp'eccation of Iiettgrs Patent. Patented ADI'. 11, 1911.

Application filed February 26, 19'10. Serial No. 546,247;

To all fwhom 'it may concern: Y

Be it known that I, HARRYG. GEISSINGER, a citizen of the United States,residing at New York, in the county of New York and Stateof New York,have invented new and useful 'Improvements in Valve-ControHer Mechanism,of which the following is a specification.

My invention 1relates to` valve controller mechanism operatin toregulate the movements of valves an Ldampers under alltomatic control.

For the purpose of illustrating one embodiment'of my invention, I willdescribe its application .to the regulation of -dampers operating toAadmit hot and cold air to a distributin `box orduct in a heating system4 subjecte to thermostatic control.

It is well known thatevery thermostat has a certain lag in itssensitiveness anddoes ,not respond instantly to a changed condition inthe surrounding temperature. This lag usuallyV causes a' difference offrom one to two degrees to intervene between the condltion of a.surplusof heat and a deficit of .heat. Now it requires the lapse of a certaininterval of time to raise the temperature of a room two' degrees by asurplus supply of heat and a corresponding amount pf time to lose thisheat under a lessened supply. It is probable thatl twenty Ininuteswouldbe a fair average of time consumed in making this chan e in the range oftemperature. During this interval, the damper is o ening or closingund'er the iniuence of the t ermostat, and if the motion is too rapid,there Y will be deliveredalternately into the airpipe or conduit blastsofcold and hot air caused by the hunting or fluctuation of the damper.On the other hand, if the i motion of the'damper is too slow, a longtime is required to find the niean position on `starting from a coldroom.

. It has been found that there is a general 'defect in the motion of thedamper durino the time'of lag ofthe thermostat which is productive ofdifferent percentage effects,

of perhaps 160, woul depending upon the position of the damper.

Thus, if the damper has been in a position to entirely close off the hotair, .a movement of one quarter of the throw of the'damper,

mixing hot air of probaby 180 with cool noticeable difference in thetemperature of lthe air supplied through the common duct.

produce a very y Again, in the control of dampers in the dues of coalViires,"the' liability of closing the damper suddenly or completely whena reduction of heat was desired, would often be even dangerous. p In thecontrol of steam applied to heating coils, the heat inertia of the massof metal in the heater, 'combined with the lag of the thermostat in adifferentl room, lnevitably causes the heater to My invention aims tocounteract the ill eEects due to the lag of the thermostat and preventthe hunting of the dampers and the alternate delivery .of hot and coldblasts, by givinga compound mot-ion to and controlling the speed of theslow component of the motion.; and also by changing the ratio of therapid and slow components of motion in accordance with the differentpositions 'ofthe valve or damper.

This invention will be more clearly under'- stood from the followingdescription in connection with the accompanying drawings, in which-.- 4

Figure -`1 illustrates al valve or damper operatingv mechanism embodyingmy inventlon; and Figs. 2 and 3 show different positions of the devicefor determining the ratio between the rapid and slow components orelements of the compound valve movement.

. trol of the valve or damper which regulates the proportions of hot andcold'ai-r entering the common4 duct or heat distributing pipe leading tothe rooms of a building. Thus, in Fig. 1, the channels l'and 2 conductthe cold in' proportions depending upon the position head 5 of the powermechanism through the lever 6 and link 7. The piston 9 may be operatedwithin the cylinder 10 by compressed air, steam or other fluid from the4supply pipe 12, andentering the ports 13, 14, alternately under thecontrol of 'the valve 15 in the'valve'chest 1G. I have shown the valveunder the control of a thermostatli), inthe located in a distant.room inwhich the temperature is to be regulated.

The operation. of the valve controlling mechanism will be clearlyunderstood from the drawing. In the position shown, the

deliveralternate blasts ot' hot and cold air.

the valve or damper actuating .mechanism lMy invention may -he appliedto the con--v of the damper 4, which is connected to the" circuit of abattery 20 and which .may be.

and hot air into the common supplyduct 15 arranged to be actuated by asolenoid 18,

port 14 is connected with, the source .of fluid pressure through thegroove 21 of the valve, and the port 13 with the exhaust 22 through theopening 24. When the solenoid is energized by the closing of thethermostat contacts, the valve 1,5 will be lifted thereby'connectingthe' port 13 with the 7source of fluid pressure through the valve groove21 and connecting the port 14 withthe exhaust 22 and causing the pistonto-descend..

It will be readily seen that the piston may descend rapidly until thevalve has been moved to about mid-position, when the upper lug 25 of thehead strikes the arm 27 pivoted at 28 and connected with thestem 29 ofthe .dash-pot piston 30.A From this point the remainder of motion of thepiston 9'is regulated in speed by the action of the liquid in thedash-pot and may be made to travel vvery slowlyv indeed. Thel liquid inthe dashpot 31 can pass .from one-side of the piston to the other byflowing through the contractved passagein the by-p'ass tube 33, the sizeof the orifice being controlled' by an adjustable valve 35. Theadjustment of this valve is made to suit the special conditions of anyparticular installation, and, as previously l explained, can beregulated to cause a very slow movement ofthe valve. The eiect of thiscompound movement of the piston 9 is to cause a rapid movement of thevalve 4 during the rst portion ofits travel, say onehallV of the throwofthe valve, or thedistance a, when the influx of cold air into thefull. stream of hot a'ir will not cause too great a change in the degreeof temperature, while the remainder of the Ivalve travel is very slow',since a sudden movement increasing rapidly the influx of cold air andacorresponding diminution ofthe hot air would producel too violentchanges in the resultant temperature. very slowly brought to its properposition to cause the desired:- mixture of hot and cold air and thegradual change of temperature.--

The above range of rapid movement of the piston and Jvalve motion issuitable when the valve starts from the position shown in Fig. 1, withthe cold air entirely cut 0H and the hot air fully on., If, however,-thevalve yis in mid-position when the thermostat causes l have a'greatereii'ect'by 4reason of the fact.

that it is nowcutting oli' the supply of hot air with every change ofposition. By examining Fig. 2, it will be evident that my'in ventionautomatically provides for the necessary change in the range of rapidmovement,l

i because the distance a now between the lever 27 and the lug 25 Uisonly one-half as great'as the distance "a, when the parts were per rangeof movement the rst portion of sired value. Diiferent lositins of thearm The valve or damper is thus esas/.tavv

in the extreme upper position shown in Fig. 1. The dash-pot regulation,therefore, comes into action after a short portion of the movement ofthe piston.

Vhen the damper. is closed, shutting o' 70 the hot air entirely, the arm27 of the dashpot will be inclined downwardly and engage both lugs 25and '26 of the piston-head 5, as shown in Fig. 3. When the parts are inthis position, a change in temperature acting upon the thermostat tocause an upward moverrrent of the piston cannot result in any rapidmovement of the damper because any movement of the piston is under thecontrol ofthe dash-pot and must necessarily be slow, thus preventingany' sudden inrush of hot air which would precipitate a rapid change inthe resultant temperature. The movement ofthe damper when it is near itslower limit is gradual because the parts. are in the position shown inFig. 3', and are'under the control of the dash-pot for movement ineither direction, but when the damper is in the upthe throw willalwaysbe rapid. The proportion of the throw ofthe damper which shall berapid is fixed by the construction of the head and the inclination ofthe lugs 25, 26, andmay'be made any de- 95 27 ,correspoilding tod1ferent positions 'of the damper, permit ofrapid motion over. the sameproportion ofthe remaining ar'ci of travel and thus automaticallyproduce the motion necessary for perfect regulation of temperature wherethe compartmentis lo- 'cated atnJ distance from'the heater, or the'heater or the -fire possesses great inertia or tendency to persist. eLikewise the restraint of the dash-pot is regulated by vthe size of thepassaffe in the by-pass tube,an`d,may be ad justed5 by the valve 35 tocause any desired graduated speed, providing `the time elementnecessary, to com ensate forthe lag in the thermostatic 'e ement andovercom- 110 -ing the hunting of the damper, a defect frequentlysystems.

Wrhile I have described rather minutely an embodiment of my inventionapplied to 115 the regulatin 'damper in a system of heat control, it wil be .evident to engineers and other skilled persons that it is.applicable not only to the control of valves for the4 control of coolingor systenis of refri eration, but also in many, other relations w ere ina compound motion is desired in the operation-ofl a reciprocatin valveor other part. I Agaimit is to be 'un erstood that I have. shown thepilot valve actuated by means of a solenbid, merely for purposes ofillustration, and that I am not restricted thereto, since it is evidentthat I may employlother means to actuate -the same.

found in temperature regulating* I am also-'aware' that other-changesmay 130;

he made in the structures embodying my retarding itsmotion duringanother portion of its travel, andmeans for varying the extent of saidunrestrained motion.

2f Valve controlling mechanism comprising a valve, means for operatingsaid valve, a thermost-atically controlled device lfor. determining thedirectionV and amount of travel of said` operating, means, and meansforpermitting unrestrained motion of said operating means durin a `portionof its travel and 'for mechanically retarding its motion during anotherportion of its travel.

3. Valve controlling mechanism comprising a4 valve', means for operatingsaid valve through a certain range` of' motion, means for varying theamount of travel of said operating means, and means for Vpermittingunrestrained motion of said operating means during a portion of itstraveland for mechanically.,retarding its motion during another portionof its travel.

4. Valve controlling mechanism compris-- ing a valve, means foroperating said valve through a certain range of inotion, means lforvarying the amount of travelofgsaid operating means, and means forpermitting unrestrained motion of` said operating means Vduring aportion' of its travel and for mechanically retarding its motion duringanother portion of its travel, the relation of the unrestrained of therange of m0 lon being substantially 5. Controlling mechanism'forreciprocating or oscillating valves, comprising a valve, operatingmechanism having constant driving connection therewith, means forpermitting :tree movement of the operating parts during a portion of therange of movement p and for mechanically retarding the:

portion to the remainder witnesses.

same during another portion of the movement, the amount of said freemovement depending upon the relative position of the parts. c

6. Controlling mechanism for reciprocating or oscillating valves havingconstant driving connection with the operating means,

comprising means for permitting free movement of the operating partsduring a portion of the range of movement and for mechanically retardingthe same during another Iportion of the movement, the amountof said freemovement dependingupon the relative position of the parts, and means forregulating the amount of retardation.

' "1'. Controlling mechanism for reciprocating or oscillating valves,comprising operating mechanism therefor provided with a head havingparallel spaced lugs inclined with respect to thel direction ofmovement,a retarding device having an larm intermediate said lugs and adapted toengage one or "the other lug depending upon the direction of movement,and means for regulating the action of said retarding device.

8. Controlling mechanism for reciprocating or oscillating valves,rcomprising operating mechanism therefor provided with a head having`spaced lugs, a retarding device intermediate said lugs and adapted toengage one or the other lug during a portion of the travel ofthe head ineither direction,

depending upon the directionvof movement,

and means for regulating the action of said retardingwlevice. v.' v

9.v Contr lling mechanism for reciprocating mechanism therefor providedwith a head said lugs and adapted toenglage one or the other vlugdependingl upon t e direction of movement.

In testimony whereof I have hereunto set my Vhand in HARRY Gr`GEISSINGER. Witnessesc 1 LAURA E. SMITH,

'or oscillating valves, comprising operating presence of twg subscribingl

